How severe is CVE-2024-39943?

CVE-2024-39943 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-39943 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 48% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-39943?

CVE-2024-39943 affects Rejetto Http File Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-39943?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2024-39943 have an EU (EUVD) identifier?

Yes. CVE-2024-39943 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2262.

When was CVE-2024-39943 published?

CVE-2024-39943 was published on 2024-07-04 and last updated on 2026-06-17.

CVE-2024-39943

CVE-2024-39943 is a critical-severity vulnerability in Rejetto Http File Server with a CVSS 3.x base score of 9.9. Its EPSS exploit-prediction score of 48% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
EPSS exploit prediction: 48% (99th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-2262
Weakness: CWE-78
Affected product: Rejetto Http File Server
Published: 2024-07-04
Last modified: 2026-06-17

Description

rejetto HFS (aka HTTP File Server) 3 before 0.52.10 on Linux, UNIX, and macOS allows OS command execution by remote authenticated users (if they have Upload permissions). This occurs because a shell is used to execute df (i.e., with execSync instead of spawnSync in child_process in Node.js).

Frequently asked questions

What is CVE-2024-39943?: rejetto HFS (aka HTTP File Server) 3 before 0.52.10 on Linux, UNIX, and macOS allows OS command execution by remote authenticated users (if they have Upload permissions). This occurs because a shell is used to execute df (i.e., with execSync instead of spawnSync in child_process in Node.js).
How severe is CVE-2024-39943?: CVE-2024-39943 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-39943 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 48% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-39943?: CVE-2024-39943 affects Rejetto Http File Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-39943?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2024-39943 have an EU (EUVD) identifier?: Yes. CVE-2024-39943 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2262.
When was CVE-2024-39943 published?: CVE-2024-39943 was published on 2024-07-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:rejetto:http_file_server:*:*:*:*:*:*:*:*

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